If my mod does not bring your preferred GUI layout, you can easily make your very own. This is how I was doing my changes:

1. Install Gimp
2. Install an addon for Gimp that allows you to open DDS files (e.g. https://code.google.com/archive/p/gimp-dds/ )
3. Navigate to ...\SteamLibrary\steamapps\common\KingdomComeDeliverance\Data
4. Copy gamedata.pak to a temp folder to work with a copy
5. Extract gamedata.pak. This will give you three folders named: Libs, Materials and Prefabs
6. Navigate to ...\Libs\UI\Textures
7. Open the desired file with Gimp (e.g. Hud_main.dds, which contains the compass background, your reticle, healthbar and some other textures).
8. Make your changes and export your changes to a file named just like the one you just opened with gimp (e.g. Hud_main.dds). If make up another filename, KC:D will ignore your file.
9. Now, place your new file in an empty folder structure that matches with the one you got the original file from. In the case of Hud_main.dds, it'll be a folder named "Libs", containing a folder named "UI", containing a folder named "Textures", which shall contain your new Hud_main.dds file. You must pay attention to correct folder names. Otherwise, KC:D will also ignore your changes. (Don't place anything else in these folders, except the file(s) you've changed, to keep your mod clean and compatible with other mods.)
10. Make a container from this new folder that holds the folders and your changes (ZIP will do the trick) and change its file-suffix to .pak (e.g. rename sample.zip into sample.pak). This container's filename doesn't matter to KC:D.
11. Now, navigate to your KC:D mod folder
(...\SteamLibrary\steamapps\common\KingdomComeDeliverance\Mods\) and make a new folder (e.g. MyLovelyMod), make another folder named "Data" inside your new folder and paste your pak file right into this "Data" folder.

Order matters: If you're using my mod and want to make your own changes to Hud_main.dds, you either need to remove the respective files from my mod, or your mod needs to get loaded after my mod. You'll change the order by your mods' folder name (e.g. rename your folder into zzzMyLovelyMod to ensure it'll get loaded at last).

That's it.